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Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore , is male and the larger megaspore is female. Heterospory evolved during the Devonian period from isospory independently in several plant groups: the clubmosses , the ferns including the arborescent ...
In Thompson's The Media and Modernity, he breaks down the term mass communication and questions whether it is applicable to today's current media environment. He firstly highlights the use of the word 'mass' and claims that most of the media today are not produced for the masses, rather they are produced for niche markets. [4] "The term 'mass ...
Exemplifying Differentiation and System Theory, this photographic mosaic may be perceived as a whole/system (a gull) or as a less complex group of parts.. Talcott Parsons was the first major theorist to develop a theory of society consisting of functionally defined sub-systems, which emerges from an evolutionary point of view through a cybernetic process of differentiation.
Heterospory evolve independently and convergently several times in different plant groups. The herbaceous Lycopodiales of today are homosporous, but their extinct arborescent relatives such as Lepidodendron were heterosporous. Bateman and DiMichele in the title of an influential paper described it as "the most iterative key innovation in the ...
In sociology, social complexity is a conceptual framework used in the analysis of society. In the sciences, contemporary definitions of complexity are found in systems theory , wherein the phenomenon being studied has many parts and many possible arrangements of the parts; simultaneously, what is complex and what is simple are relative and ...
Social development theory attempts to explain qualitative changes in the structure and framework of society, that help the society to better realize aims and objectives.. Development can be defined in a manner applicable to all societies at all historical periods as an upward ascending movement featuring greater levels of energy, efficiency, quality, productivity, complexity, comprehension ...
The sociology of education is the study of how public institutions and individual experiences affect education and its outcomes. It is mostly concerned with the public schooling systems of modern industrial societies, including the expansion of higher , further , adult , and continuing education.
The USSR painted itself as a socialist society which emerged from class struggle, destined to reach the state of communism, while sociologists in the United States (such as Talcott Parsons) argued that the freedom and prosperity of the United States were a proof of a higher level of sociocultural evolution of its culture and society. At the ...